Kevin buys a box of 80 chocolate bars for £35.
He sells 55 of the bars for 75p each. He sells the remaining bars for 40p each.
Work out Kevin's percentage profit. Give your answer correct to three significant figures.
Practise OCR GCSE Maths Percentage Change with exam-style questions for Foundation and Higher tier. 56 questions, matched to the OCR GCSE Maths (J560) specification and written in the written papers style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.